Be even easier if they provided an MRSS feed! I wonder if a popular channel on YT started making their content available in an easy to parse format like MRSS if they'd notice a significant loss in YT viewers in favor of it. Of course, they'd then lose the ad share, so probably not a thing that will happen.
How fast would YT issue a C&D if someone created an app that did this for you so that you just entered in the channels you follow, and then it would just check every so often for new content?